变温重载作用下沥青路面结构动态变形特性研究  

Dynamic Deformation Characteristics of Asphalt Pavement Structure Under Variable Temperature and Heavy Duty

作　　者：申冲冲 司春棣 凡涛涛[2,3] 张孟强 高海波 Shen Chongchong;Si Chundi;Fan Taotao;Zhang Mengqiang;Gao Haibo(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Traffic and Transportation,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Jing-Xiong Expressway Preparatory and Construction Office of Hebei Expressway Group Ltd.,Baoding 071799,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学交通运输学院,河北石家庄050043 [3]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [4]河北省高速公路京雄筹建处,河北保定071799

出　　处：《石家庄铁道大学学报（自然科学版）》2023年第1期54-60,119,共8页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(11972237);河北省交通运输厅科技计划项目(JD-202006,JD-202007,JX-202010)。

摘　　要：采用ABAQUS软件建立沥青路面三维模型,根据某工程所在地区7月份1天代表性温度,考虑沥青路面的材料性质随温度变化的特征,进行变温重载下路面结构温度场及变形分析。改变行车速度、接地压力等,量化不同深度结构层永久变形、剪切蠕变特征。结果表明,永久变形、剪切蠕变值在整个行车道路横向范围内呈正负交替变化;慢速(20~60 km/h)时,车速增大对永久变形、剪切蠕变的减小程度均明显高于快速(80~120 km/h),永久变形、剪切蠕变主要出现在上中面层;行车速度低于60 km/h、接地压力大于0.9 MPa,路面永久变形发展快速增加。在夏季高温季节应限制慢速交通和超载重载车辆,适时错峰出行和洒水降温能有效减少车辙破坏。The three-dimensional model of asphalt pavement was established by ABAQUS software.According to the typical temperature of a day in July in some project area,the temperature field and deformation of pavement structure under variable temperature and heavy duty were analyzed considering the characteristics of material properties of asphalt pavement changing with temperature.The permanent deformation and shear creep characteristics of structural layers at different depths were quantified by changing the driving speed and ground stress.The results show that the vertical deformation and shear creep value change alternately in the transverse range of the whole driving road.At slow speed(20~60 km/h),the decrease of vertical deformation and shear creep with the increase of vehicle speed is significantly higher than that of fast speed(80~120 km/h).Permanent deformation and shear creep mainly appear in the upper and middle layers.When the driving speed is lower than 60 km/h and the ground pressure is greater than 0.9 MPa,the development of permanent deformation of pavement increases rapidly.In summer high temperature seasons,slow traffic and overloaded vehicles should be limited.Timely peak shifting travel and sprinkler cooling can effectively reduce rutting damage.

关 键 词：车辙 蠕变 温度场 重载 车速 

分 类 号：U416.217[交通运输工程—道路与铁道工程]